Water cooler



FIG. 1 is a top perspective view of a water cooler showing my newdesign;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top plan therof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear view thereof.

The ornamental design for a water cooler, as shown and described.